Magnetic-field-induced superconductor-insulator-metal transition in an organic conductor: An infrared magneto-optical imaging spectroscopic study
Tatsuhiko Nishi, Shin-ichi Kimura, Toshiharu Takahashi, Hojun Im, Yong-seung Kwon, Takahiro Ito, Kazuya Miyagawa, Hiromi Taniguchi, Atsushi Kawamoto, Kazushi Kanoda
DOI 10.1103/PhysRevB.75.014525 · Physical Review B
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Abstract
The magnetic-field-induced superconductor-insulator-metal transition (SIMT) in partially deuterated κ−(BEDT−TTF)2Cu[N(CN)2]Br, which is just on the Mott boundary, has been observed using the infrared magneto-optical imaging spectroscopy. The infrared reflectivity image on the sample surface revealed that the metallic (or superconducting) and insulating phases coexist and they have different magnetic-field dependences. One of the magnetic-field dependence is SIMT that appeared on part of the sample surface. The SIMT was concluded to originate from the balance of the inhomogeneity in the sample itself and the disorder of the ethylene end groups resulting from fast cooling.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (BEDT-TTF)2Cu[N(CN)2]Br Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11 | Pressure not reported | unknown |
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